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9 ]B85 larvas 037 <br /> Sequoia O1'd, 1Norgan Hr1E CA 955037 <br /> Analytical (498)776 9600 <br /> FAX 782 6908 <br /> www sequoequoialabs coin <br /> i <br /> URS Corporation[Arcol] Project BP Heritage#11194,Tracy,CA MOH0245 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G07WZ-0011 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 08/I9/05 06 53 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %RBC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 5H12011 -EPA 5030E PIT/EPA 8260B <br /> Blank(5HI2011-BLKI) Prepared&Analyzed 08/12/05 <br /> tert-Amyl methyl ether ND 050 ug/l <br /> Benzene ND 0 50 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> Ethanol ND ]00 " <br /> Ethyl Cert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate l 1-Dichloroethane-d4 234 250 94 60-135 <br /> Adbklank(51112011-BLK2) Prepared&Analyzed 08/12/05 <br /> 'Wert-Amyl methyl ether ND 050 ug/l <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 12-Drchloroethane-d4 2 52 250 101 60-135 <br /> Laboratory Control Sample(51112011-BS1) Prepared&Analyzed 08/12/05 <br /> tert-Amyl methyl ether 161 050 ug/I 150 ]07 80-115 <br /> Benzene 5 16 050 5 16 100 65-115 <br /> tert-Butyl alcohol 144 20 143 10I 75-150 <br /> Di-isopropyl ether 161 050 151 107 75-125 <br /> Ethanol 146 100 141 104 70-135 <br /> Ethyl tert-butyl ether 157 050 150 105 75-130 <br /> Ethylbenzene 754 050 754 100 75-135 <br /> Methyl tert-butyl ether 7 14 050 702 102 65-125 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> • <br /> Page 14 of 16 <br />